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Two urns containing white and red balls. In probability and statistics, an urn problem is an idealized mental exercise in which some objects of real interest (such as atoms, people, cars, etc.) are represented as colored balls in an urn or other container. One pretends to remove one or more balls from the urn; the goal is to determine the ...
The model represents objects of interest (such as atoms, people, cars, etc.) as colored balls in an urn. In the basic Pólya urn model, the experimenter puts x white and y black balls into an urn. At each step, one ball is drawn uniformly at random from the urn, and its color observed; it is then returned in the urn, and an additional ball of ...
Assume that an urn contains red balls and white balls, totalling = + balls. n {\displaystyle n} balls are drawn at random from the urn one by one without replacement. Each red ball has the weight ω 1 {\displaystyle \omega _{1}} , and each white ball has the weight ω 2 {\displaystyle \omega _{2}} .
There are two urns each containing 100 balls. It is known that urn A contains 50 red and 50 black, but urn B contains an unknown mix of red and black balls. The following bets are offered to a participant: Bet 1A: get $1 if red is drawn from urn A, $0 otherwise Bet 2A: get $1 if black is drawn from urn A, $0 otherwise
The balls into bins (or balanced allocations) problem is a classic problem in probability theory that has many applications in computer science.
Why tourists are being told to wipe their shoes before visiting the ‘world’s clearest lake’
Smoothies are an easy and convenient way to load up on lots of nutrients in one fell swoop. You can enjoy them at any time of day or take them on the go.
Volunteer nurse Jenny Sims, in white, hugs Nyangu Chipembere as Angel Baltazar looks on. The cremated remains of Baltazar's aunt were lost in a house that burned during the recent Altadena wildfire.